pure-Python 3D coordinate conversions for geospace

 Pure Python (no prerequistes beyond Python itself) 3-D geographic
 coordinate conversions and geodesy.
 API similar to popular $1000 Matlab Mapping Toolbox routines for Python.
 .
 PyMap3D is intended for non-interactive use on massively parallel (HPC)
 and embedded systems.
 Includes some relevant Vallado algorithms.
 .
 The package provides conversion functions between the following
 coordinate systens:
 aer, ecef, eci, enu, geodetic, geocentric, ned, azel, radec.